SparkFun Noisy Cricket Stereo Amplifier – 1.5W (DEV-14475) SparkFun

DESCRIPTION

The Noisy Cricket Stereo Amplifier, uses the LM4853 Boomer IC which can be configured to output up to 1.5W of power in mono operation (4 Ohm load) or 300mW per channel in stereo operation (8 Ohm load). The amplifier comes with a dual-ganged pot with a built-in switch to control power and adjust both left and right channel gain.

The SparkFun Noisy Cricket has been designed as an easy to use board with three connection sections, Power, Input, and Output. The power section features three connections, VCC, VCC OUT, and GND all only requiring a voltage range of 2.4-5.5VDC but with only one connection. Meanwhile, the Input and Output sections both have connections for GND, LEFT IN/OUT, and RIGHT IN/OUT for your audio inputs and outputs. It is important to point out that the Output section of the board does feature an extra pin labelled MONO, to use this pin (since the Noisy Cricket operates in Stereo out of the box) and get the full output power from the amplifier you’ll need to configure the Noisy Cricket as a mono amplifier, that way the left and right input channels will be combined to drive a single speaker. To enable mono operation all you will need to do is solder two jumper pads on the back of the board labelled ENABLE MONO OUTPUT and MONO BASS BOOST.

With the SparkFun Noisy Cricket Amplifier, you will be provided with a board that fits into the palm of your hand that requires a minimal setup that allows you to utilise both stereophonic and monaural sound!

FEATURES

• Class AB Amplifier
• 2.4-5.5VDC Supply
• Mono – 1.5W into 4 Ohms
• Stereo – 300mW into 8 Ohms
• Dual Ganged Pot with built in switch to change left and right volume simultaneously, and control power
• PTH pads are provided to change gain resistors if desired
• Solder jumper to switch between mono and stereo operating modes

RESOURCES

• Schematic
• Eagle Files
• Hookup Guide
• Datasheet (LM4853)
• GitHub